Filter
Top Products
GEQ-1231D/GEQ-2231D 31-Band Graphic Equalizer/Limiter
important to achieve sufficient signal level to light all green and yellow LEDs of
the Input Level Meter. Avoid lighting the red (overload) LEDs except on rare
occasions and for short duration.
If the source level is too low, input gain may be increased with the Input Gain
Control, with only minimal signal degradation.
For more information on setting up input/output gain structure, see the notes on
Unity Gain mode in the DIP Switch Selector section on page 11.
In the GEQ-1231D, a single Input Gain Control is provided.
In the GEQ-2231D, two independent Range switches are provided.
3. Range Switch
The Range switch selects the operational mode of the 31 frequency-band slider
controls, which can operate over a ±12dB or ±6dB range. The ±6dB range will
provide a more precise range of adjustment, and is sufficient for most
applications.
In the GEQ-2231D, two independent Range switches are provided.
4. Cut-Only Switch
When this switch is activated, the 31 frequency-band slider controls will function
as attenuators (no EQ boost), from 0dB (flat) to –6dB or –12dB, depending on the
position of the Range Switch (3). The corresponding level scale for cut-only mode
is indicated in red on the front panel.
Cut-only mode is particularly useful in notching out specific frequencies for
feedback reduction.
In the GEQ-2231D, two independent Cut-Only switches are provided.
5. Bypass Switch
This switch functions as a true hardware bypass – that is, it directly connects the
unit’s inputs and outputs, and is therefore useful in the event of a power outage.
The Bypass Switch is useful for quick comparison of the original sound with EQ’ed
sound.
In the GEQ-2231D, two independent Bypass switches are provided.
6. Limiter Link Switch (GEQ-2231D only)
This switch will couple the peak limiter modules in both channels of the GEQ-
2231D for stereo operation. The limiter circuitry in each channel still functions
independently, but the higher gain reduction is applied synchronously to both
channels.
When Limiter Link is deactivated, both channels function independently, in dual-
mono mode.
7. Channel Link Switch (GEQ-2231D only)
This switch will allow the GEQ-2231D to function in stereo mode. When the
Channel Link Switch is activated, the integrated LED will light, and the tone
control and limiter functions of both channels will function synchronously. The
lower row of controls is deactivated, with all EQ functions governed by the upper
row of controls, and the Limiter Link Switch (6) is automatically activated.
8. Low-Cut Filter Frequency Control
This knob controls the range of the low-cut filter, from approximately 12.5Hz to
200Hz. The filter is designed to aid in cutting unwanted low frequencies, such as
8